My only wish is that Hastings played more of a role in more stories. I suppose she limited his inclusion to dissuade readers from making more Sherlock Holmes comparisons. Her stories are all lovely. I recently read Dumb Witness, I really enjoyed it! Sometimes her most popular works like Murder on the Orient Express and Death on the Nile can cast a shadow on the hidden gems.

It’s all personal preference I suppose, some influential philosophers can be hard to read. For example, I really don’t like to read Locke though I recognize his value. Anyway, the one sentence summary or Nietzsche is that he wrote about a lot of the nihilism and tragedy that accompanies a society which is becoming less religious and more scientific. Since there is no moral code because God is dead, nothing matters, essentially. He also doesn’t believe in free will and thinks the very idea of it is a stupidity.

Personally, I value his contribution to philosophy, and I am amazed at how many of his predictions came to pass (particularly those predicting the world wars) but I’m not fully on board with his nihilism. I’ll leave you with one of my favorite Nietzsche quotes, though: “If you crush a cockroach, you’re a hero. If you crush a beautiful butterfly, you’re a villain. Morals have an aesthetic criteria.”

Hope this was of some help, though I’m by no means a Nietzsche expert, maybe a YouTube video on him could help you out.